Nail in a Tree ID: 3691 | This file appears in: Tree Spiking in Idaho's Clearwater National Forest, 1989 Tree spiking involves driving nine to ten-inch metal nails into trees to deter deforestation. This was a popular tactic by some radical environmentalist groups. | Source: "Nail in a Tree" Jan Krutisch. 14 July 2005. https://commons.wikimedia.org/wiki/File:Nail_in_a_tree.jpg Download Original File Source"Nail in a Tree" Jan Krutisch. 14 July 2005. https://commons.wikimedia.org/wiki/File:Nail_in_a_tree.jpg "Nail in a Tree" appears in: Tree Spiking in Idaho's Clearwater National Forest, 1989
